#app{
    width: 400px;
    height: 400px;
    position: relative;
    border: 1px solid red;
    margin: 0 auto;
    text-align: center;
    div{
        button{
            position: absolute;
            left: 165px;
        }
    }
    img{
        width: 400px;
        height: 400px;
    }
}